Looking through the creation of the firewall rules [1] I can see that there's no port after tcp which you should specify. Please take a look at the documentation and the flags that you've used when creating the rules to compare the syntax as well as the flag should be followed by "=" and the value for that flag.
[1] https://cloud.google.com/sdk/gcloud/reference/compute/firewall-rules/create -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/0bfceccd-2148-4e22-af2f-6b9377dc52bb%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
